for further information contact your local stmicroelectronics sales office. may 2012 doc id 023212 rev 1 1/4 4 STEVAL-ISF001V2 new 3 kw fot pfc based on the l6563s and stw88n65m5 data brief features fot power systems based on the l6563 single range input voltage from 185 v to 265 v @ 50/60 hz line output voltage 400 v 5% inductor saturation protection optimized emc input filter (en55014 and en55022) power factor > 0.98 efficiency higher than 95% thd below 10% starting from 1 kw rohs compliant description the STEVAL-ISF001V2 demonstration board provides a compact and ready-to-use solution for the implementation of a simple pfc system able to supply loads with a power close to the maximum delivered in the most typical domestic installations. for such a power range the use of a continuous mode pfc operation becomes mandatory in order to drain from the net a current with an rms value that does not surpass the maximum allowed from the metering system and to have a reasonable device size involved in the system operations. normally, the use of a standard continuous mode driver chip means the use of a more expensive and complex driver along with all the passive components required. stmicroelectronics has patented a solution that allows the use of a simple driver, designed for transition mode operation, in a fixed off-time, variable frequency, pwm modulation. this kind of modulation gives a current on the boost inductor of the pfc that is comparable with the current obtained using a classic continuous mode modulation. www.st.com
schematic diagram STEVAL-ISF001V2 2/4 doc id 023212 rev 1 1 schematic diagram figure 1. schematic diagram ! - v 7 p v u 7 p v u 7 p v u
STEVAL-ISF001V2 revision history doc id 023212 rev 1 3/4 2 revision history table 1. document revision history date revision changes 25-may-2012 1 initial release.
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